George



(No Model.; v

\ Gm. mam.

STEAM BOILER. No. 2521 M3, Mmm-d am. 10;;1882.

WITNESS@ raras naar "anice-2t cnonon Mason, 'or Banner satirica-VIRGINIA.

SPECEFICATIGN forming part'. ofA Letters Patents-Nc. 3432,113, dated January 10, 188% Application tiled- July 7, 1881. (No model.)

1h all whom it) may concern;

Be it known .that I, Gannon F. MAJOR, of

1 Brandy Station, in the county of Uulpeper and State ot' Virginia, have invented a. new and 5 ,useful Improvemeutin Steam-Boilers,oi` which v 1the following is a fullciear, and exact description, reference being had to the annexed drawings, forming part of this specitication.

'My invention relates to tubular boilers in to which the tubes are arranged side by side; and

it consists in the peculiar'construction ofa nbc having a reduced vnd and the alternatelvreversed arrangementof twol or more series oi' such tubes.,v each seriesl cf which is connect x 5 ed with a drum at each end, with the drums so disposed as to -f'orin fines between the'series ot' tubes, :is hereinafter described.

In the accompanying drawings, Figure lis a pla'nview ot' my improvement; Figi), aside zo elevation. Fig. i is an end'eleration; Fig. 4, one of the tubes, and Figs. and (i represent details ofthe tube.

A represents a fire-box, in each side ot' which are arranged two. parallel series of tubes, B.

25 The said tubes are slightly inclined from avertical position with the stcanrdrnius C, to one i of which theupper ends of each series are connected, lying injuxtaposition in a horizontal plane, while the lower ends of each series are n 30 connected with a mud drum, D. The two in` neroppositeseries are composedoi'tubes which have their reduced portions Z1 connected with the stento-drums C to forni draft-passages to the dues c between `the inner and outer series,

35 and the reduced portions of the tubes in the outer series are connected with the mnddruins D to form similar passages from the iues c to the lines d leading to Vthe slnokepipe. The steatndruins. C arecon'nected at one end by a 4o drum, G, and Ythe mud-drums D are likewise connected by a drum, D. v

As the joints of the tube B are exposed to the act/ion of great heat, I prefer to constructthem in the following manner: The large pon 1.45 tion of the-tube, which connects with one of site end ot" the tube B is jointed to a reduced section, i1,ot`aboutonehali`the size ofthe tube in diameter, by. means of an exterior tapering threaded collar, ha, which screws into said end.

The projecting end of the reduced section b is provided with an exterior screw-th read, onto which the threaded thiuible c is screwed. This thimbie is made tapering on its outerfsuriace, which is screw-threaded and provided with a longitudinal slit, c?, extending from end to end, into which a copper'strip, d', is inserted in order to produce a binding etect by the yieiding of the copper when the tapering end is screwed into the apertured drum. With this construc` tion the joints of the said partsareenabled to resist :he action of the intense'heat to which they are exposed. I am aware that; a boilerN tube having a reduced section at one end is not broadly new; but I am not aware that. sncha. tube has before been adapted for tho peculiar combination above described.

` twili be seen that the drums, which are made twice as iarge in diameter as the'tnbes, by being placed in juxtaposition,will serve to hold the series of tubes suiiiciently apart to forni the ilnes necessary'for the passage of the products of combustion along the 'surface ot' the tubes to the smoke-pipe.

' It isobvions that the tubes may be arranged in various other. positions than that shown in the drawings without departing from the spirit of my invention, the main principle being,r that the tubes shall` be arranged in alternately-reversed series, whereby the reduced portions ot" tho tubes shal assist informing continnons iiues for conveying the heated gases along'the two sides of each ser-ies from end to end.

Having th'ns described my invention, what: I claim is- 1-. In combination with the tube Band druin C, the tapering thiinble c', having the iongitndinal slit c2 and the copper strip d', substantially as shown and described, and for the pur- -pose set forth.

2. In combination with the drums C and D,

the series ot' inclined tnbes'B, having reduced portions, as described, and so arranged as to form draft-passages at the upper and lower ends of said series alternately, which shall coin mummia@ with ues between the sme, a@ and arranged in atrtmelywwemed' serie@ @mi foxth mamma@ apemfiif.A eombinad with drum@ @ons uniform fines be- 3. 'Ehecambmation of the tube@ B, hnviug tween the :mid srie msec forth, doubi-thredd .plug b, r'duoed section b, GEQBGE' F MAJOR; 5 having threaded callar b, and the th-lmble o', Witneascs:

having slit a und @appar @trip d substantially A; G. LWR,- a@ shawn and dgcribed, the sx1-fd tubes being Soen: 0. KEMON. 

